Meters Kit
Meters Kit
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HM Digital TDS-EZ Water Test Meter $24.99 Ideal for all basic water testing applications. The best value meter in the world! .. Economy model that is ideal for end-users. .. Highly efficient and accurate due to its advanced microprocessor technology. .. Hold Function: saves measurements for convenient reading and recording. .. Auto-off function: the meter shuts off automatically after 10 minutes of non-use to conserve batteries. .. Meas… |
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- Hydrometer Test Jar for Home Brewing or Wine Making 12 Inches Tall $2.30 The Economy Test Jar has a wide plastic base to prevent tipping, and is 14 1/4″ tall…. |
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Oakton EcoTestr pH 2 Waterproof pH Tester, -1.0 to 15.0 pH Range $57.95 Simply dip and read— the orientation of the display means no need to turn your head or tilt the tester. This low-cost meter is perfect for most applications. The single-junction electrode is recessed to protect against breakage. The unit offers up to three-point calibration with auto-buffer recognition for quick calibrations, automatic temperature compensation for accurate reading under chang… |
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Orbit 91213 One-Dial Garden Hose Digital Water Timer $31.99 This automatic garden hose watering kit has a single port for easy, automatic lawn watering. With a single dial, the Orbit 91213 hose faucet timer makes it effortless for you to set the clock, start time, duration and intervals. It features one-touch rain delay for water conservation. It comes with multilingual packaging and the water timer comes preprogrammed with multiple languages. It is constr… |
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SE Clip Test Lead Set (10 Piece) $3.00 10 Pc Set, Color Coded vinyl covered alligator clips. Each clip is crimped to ensure a good conduction. Good quality clips that close well and a strong spring to keep it closed. 10 piece set contains two of each: Black, red, white, green, and yellow. 22 gauge heavy insulation copper wire, 12 in. length…. |
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Bosch DLR130K Digital Distance Measurer Kit $79.95 Utilizing precision laser technology, the Bosch DLR130K Digital Distance Measurer Kit provides fast, easy, and accurate measurements every time you use it. Pocket sized for easy portability, this handy tool offers length, area, and volume measurements in inches, feet and inches, decimal feet, and metric units.The DLR130K DigitalDistance Measurer Kit At a Glance:Precision laser measuring technology… |
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Purina ”Glucotest” Feline Urinary Glucose Detection System (1 Packet) $8.95 Now there’s an easier way to help ensure diabetic cats are well controlled at home – with the Purina Glucotest brand Feline Urinary Glucose Detection System. The indicator pieces work in the litter box to alert owners of changes in urine glucose levels that may require veterinary attention…. |
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Elenco – Deluxe Full Function Digital Multimeter Kit (M-2666K) $35.95 Elecno’s Deluxe Full Function Digit Multimeter Kit. Features include: Extra large 1 in. , 3 1/2 digit display, transistor tester, overload protection, capacitance to 200µF, Diode test, audio continuity, AC/DC current to 20A, low battery indicatio, rubber holster, tilt stand, safety input sockets and test leads. Specifications inlcude AC+DC volts current to 20A, low battery indication, rubber hols… |
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Rapid Response 10 Parameter (10SG) Urinalysis Reagent Test Strips, 100 Strips/Bottle $13.30 Urinalysis Reagent Strips provide tests for glucose, bilirubin, ketone, specific gravity, blood, pH, protein, urobilinogen nitrite, and leukocytes… |
80 m CW-SSB Ham Receiver Kit
Ultrasonic Flow Meter – Some Basic Principles
Ultrasonic flow meter technology has much improved over the last few years and now forms a viable flow measurement technique compared to other methods such as turbine and electromagnetic type systems. The first Doppler ultrasonic flow meter units became available in the early 70’s. To begin with, as with all new technologies they were not very accurate, difficult to install and costly. However, the newest Time of Flight ultrasonic flow meter and Doppler types are proving to be both reliable and accurate. Accuracy has improved significantly with most ultrasonic flow meter manufacturers claiming 0.5% accuracy if the meters are correctly installed.
With these two technologies, which ultrasonic flow meter should you use?
Although Doppler ultrasonic flow meters use an older technology, they are ideal for liquids with air bubbles or slurries with significant solid particles. They determine the flow using the Doppler shift method, by measuring the change in frequency created by an object moving towards, or away from the measurement point. Normally liquids with a minimum of 100ppm concentration at 100microns particle size or bigger would be suitable for a Doppler ultrasonic flow meter. One stumbling block of most Doppler ultrasonic flow meter systems is that they are less accurate in low flow conditions.
A transit time ultrasonic flow meter is ideal for clean fluids such as water and oil. These meters are more advanced than Doppler ultrasonic flow meter types due to the advanced calculations used to determine the flow rate. Two transducers are used, the first sends an acoustic signal which is bounced off of the bottom of the pipe, the second transducer receives the signal. The ultrasonic flow meter is then able to determine flow by calculating the time it takes to receive the signal.
Portable ultrasonic flow meter kits are now available for plant wide surveys with minimal fuss and no down time. The first portable ultrasonic flow meter units were heavy and quite large, basically a luggable design. As ultrasonic flow meter design has improved over time, the instruments have become much smaller, lighter and more power efficient and are truly hand portable. Also many ultrasonic flow meter models now have integral data loggers, allowing the user to leave the meter on site so it can record average flow rates and flow totals.
An ultrasonic flow meter will be most accurate when fitted on a long, straight piece of pipe, free from obstructions such as elbows and valves. Also, any rusty pipes should be cleaned before using an ultrasonic flow meter. Ultrasonic jelly should also be smeared under the sensor to ensure a solid contact on the pipe.
The biggest advantage to using an ultrasonic flow meter is maintenance. Older insertion meters usually require the plant to be shut down while installing. However an ultrasonic flow meter can be installed without stopping the process. Also as an ultrasonic flow meter has no moving parts it cannot wear out.
Both Doppler and transit time portable ultrasonic flow meter kits are available from Omni Instruments for hire or purchase.
By Richard Burgess
OmniInstruments.net
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About the Author
Jim Furness is CEO of Omniinstruments Ltd, specialists in data logger and other instrumentation solutions such as Ultrasonic Flow Meter.
